If the product doesn't work (at all), you are entitled to a refund. You are also entitled to a fix/replacement, but it's the consumer's choice. Hinges on wheth

If the product doesn't work (at all), you are entitled to a refund. You are also entitled to a fix/replacement, but it's the consumer's choice. Hinges on whether the product has a "major failure" or a (lesser) defect.